
ContentsAcknowledgements1. Origin, use and interpretation of Feynman diagrams2 Quantum electrodynamics without Feynman diagrams3 Quantum mechanics without a Hamiltonian operator4 The Dirac equation: Feynman's great struggle.5 Free propagation and successive scattering.6 The ?eld...

ContentsAcknowledgements1. Origin, use and interpretation of Feynman diagrams2 Quantum electrodynamics without Feynman diagrams3 Quantum mechanics without a Hamiltonian operator4 The Dirac equation: Feynman's great struggle.5 Free propagation and successive scattering.6 The ?eld...